Carbureter



l. V. GIESLER.

CARBURETER.

APPLICATION FILED sEPT.25. 191s. y 1,392,141 PatentedSept. 27, 1921.

2 SHEETS-SHEET l.

"1.`v.G|EsLER.

CARB'URETER.

APPLICATION FILED SEPT, 25. i916. 1 1,392,141. Pandsept. 27,1921.

2 SHEETS-SHEET 2.

p To all 'whom 1i/may concern:

UNITED VSTATES' PATENT. ori-fics.

JEAN v. GVIESLEP., or xNoxvILLE, TENNESSEE, ASSIGNE To. TEE rtLroN COMPANY,

or xNoxvILLE', TENNESSEE, a coEPonArIoN' or MAINE.

specincation of Letters Patent. Patented Sept. 27, 1921.

Application med september 25, 191e. .serial No. 122,122.

Be it known that I, JEAN V. GmsLER, a citizen of the nited States of America, and aresident of Knoxville, Tennessee, have invented a new vand useful Improvement in Carbureters, which invention is fully set forth in the following speciicatio This invention relates to mternal combus-l tion engines, and is particularly designed for use with engines of this type in which a cooling. medium is circulated in operative or heat-i'nterchanging relation to the engine.

It is a well-known fact that when an in-y ternal combustionk engine is started, the cylinder or cylinders being cold, more gasof leneor other fuel per volume of air is re quired for satisfactory operation than when the cylinders have become warm. It has accordingly been .the practice to provide a rich mixture of fuel and air whenthe engine is cold, and then manually vary the mixture to decrease the proportion of fuel to air as the sumed duringthe 4normal operation 'of the engine warms up. It is angobject of this invention to provide improved means whereby the proportion of fuel to air is automatically regulated by the temperature of the engine. Itis a further object of this invention to provide means for regulating the proportion `of fuel to air which is controlledj by thermosensitive means subjected to the temperature of a cooling medium circulated inroperative.v

or heat-interchanging relation to the engine and which, preferably, is responsive only to' the temperature of said medium. Yet another` object of thisinvention is to provide a`device of the type characterized with means -whereby the regulation of .the proportionof 4 fuel to air supplied the enginemay be'manually effected independently of the automatic means for controlling said proportion of fuel,

to air. Still another objectuof this invention is to provide a device of theA type characteri ed wherein the thermosensitive means is sov y constructed that on-v failure of the temperature control, as by leakage of the-thermosensitve means, t e deviceq regulating the proportion of fuel to air supplied the `engine is" automatically moved toa osition corre- .spending withthat assumed w 'en the engine is warm, leaving to the manual control the increasing of thefrichnes's of the mixture whenjnecessary. Other objects relate to the provision t of aidevice .of `thetype set forth which isi'zsim'ple` in censtruction, inexpensive l purposes -easy to install, and efficient and an air inlet l coperating with said valve, 4

thermosensitive means for controlling theproportion of fuel to air supplied by said means, said thermosensitive meansjoeing controlled by the temperature of the engine,

turev a coolingmedium, circulated in operative or heat-interchanging relationto the engine, at substantially the temperature at which it leaves said engine. 'Means are also preferably provided for -an independent manual control of the proportion-varyin means, and the latter is furthermore pre erably so constructed and Iactuated as to assume a position corresponding to that asengine, in case of failure of the temperature control.

-The innention is capable of receiving a. variety of mechanical expressions, two of which, for 'purposesof illustration, have been shown on the accompanying drawings,

but :it is to be expressly understoodlthat these embodiments have been selected for the of illustration only, and are not to be construed as definitions of the limits of the invention, reference being had to vthe appended claims for that purpose.

Referring to the drawin s, wherein4 the 'same reference characters esignate corrfesponding parts in the severall igures,.

Figure 1 is an elevation of an internal combustion engine embodying the `present invention; i

Fig. 2 is a vertical section illustrating one manner of varying the proportion gf fuel to air supplied the engine;

preferably by being subjected to the tempera- Fig. 3 is an elevation illustrating. second 'manner of accomplishing this result;

Fig. 4 is a plan of a portion of the mechanism of Fig. 2 .illustrating connections for the manual control of the.l mechanism; and

Fig. 5 is an elevation illustrating the'struc-- turf of Fig. 3 providedv with a manual contro Refer/ng in detail `to .the drawings, `1 l I illustrates, diagrammatically an internal l combustion engine of any preferredconare shown as provided'with jackets through .ing the proportion of fuel to air whichithe cooling medium is circulated, said" cooling medium flowing from the jackets through manifold 2vto and through any sulttable form of radiatorY 3, .and returning to the jackets through .conduit 4.

The exhaust manifold of the engine is illustrated at 5 and the intake manifold of the engine at 6. 7 represents, generally, anysuitable form of carbureter, the same being shown as pro-A videdwith a fuel-regulating needle valveS for-controlling the admission of fuel and an air inlet 9. f

In the carbureter shown, fuel, yas gasol'ene, is supplied the vessel 10 by pipe 11 through an-inlet 12, controlled b a needle valve 13 carried by a float 14. uel is drawn from the vessel 10 through the nozzle-15 into the chamber provided at 16, while air isdrawn through the 'airinlet 9 to and around the exit of the nozzle l15 'and into said chamber 16.

'Any suitable form of throttle valve 17 is provided in the outlet of the chamber 16, said valve being operated by any appropriate form of operating mechanisml such as diagrammatically represented by the link 18. 19 represents the stem of the needle valve 8, the same being so mounted, asby any suitable form of gland 20, that the valve may. Abe adjusted with respect to the nozzle to` varythe amount of 'fuel drawn through the latter. member.

f -Inaccordance with the present invention, meansk are provided forautomatically vary- .supplied by the. carbureter; said means may take the form of meansL for adjusting the needle valve, aseillustrated in Fig. 2, or means for adjusting the air inlet, as illustrated in Fig. 3. In either event, the proportion-varying means is controlled by, thermosensitive means ,whereby the means for lvarying the proportion of fuel to air is regulated in accordance With the temperature of theehglne.

' In the form shown in Figs. 1 and 2, tlie valve stem 19 is provided with a inion r21 with'which coperates a rack 22. lgack ,22 is 'carried by the movable end wall 23 of an erably constructed of corrugatecl` resilient metal such as brass, and having azxed end wall 25 supported rigidly in position by any suitable form of bracket 26. Vessel 24 is in communication' through `conduit 27 with a bulb`28 subjected to the cooling medium as it flows from thejackets to the radiator. While any suitable form of means for mounting the bulb 28 in heat-interchanging relation tothe cooling medium may be employed, the illustrated embodiment comprises a' Y-coupling 29 intermediate the 'manifold 2'and the radiator 3, withinone branch of which is received the aforesaid bulb 28. The thermostat constituted by bulb' 28, conduit 27 and vessel 24 is char ed with athermosensitive or` volatile fluid t e liquid of whichpreferably fills the vessel 24 and conduit 27 and partly fills the bulb 28, leaving a vapor space in said bulb, in conformity with constructions-well understood in the fart,`- as 'see for example patent to Fulton, No. v1,102,035, granted June 30, 1914,' where- 'by upon change of temperature of the coolin medium a change of pressure is transmltted to the movable end wall 23 of vessel' 24 to regulate the aforesaid needle valve 8. Any other suitable form of thermostat, however, maybe employed in place of that illus` trated. f

jIn the form shownin Fig. 3, the stem 19 o butterfly valve 29 operated through crank 100 arm 39 and link 31 by the movable end wall 23 of the extensible and contractible vessel 24.

In order that the means for varying the proportion of fuel to air supplied the engine shall assume a position of safetyupon failure ofthe temperature control, as would oncur if the extensible and contractible vessel 24 leaked, the proportion-varying means is so constructed and actuated as to'move, in

' suchevent, /to a positioncorresponding with 110V that assumed during they normal operation of the engine, z'. e.; when the latter is warm. Thereby is )insured that'the richer mixture used when starting the engine shall not be vsuppliedthroughout the operation 'of the 1.15

enginein jcase of'failure of the thermo'sensitive means,k To'this end, the extensible and contractible vessel 24 is made ofla resilient material or otherwise constructed so asl to beexpansible by fa force of resiliency either inherent in the'same or applied thereto, and vthe system comprising said vesself24, the conduit 27 a dgthe bulb 28 is preferably, charged wthl. e thermoSen-' sitive luidat a said vessel is exteriorlyi subjected. Inl the-v latter event under normal vworking extensible'and contractible uvessel 24, preffrconditions, said vessel issomewhat contracted yby 'the pressure exterior thereto.l

the needle valve 8 'is designed to be locked 95 pressure below that towhich zation of the pressure within and without the vessel, the force of resiliency tending to expand said vessel causes the movable end Wall of the vessel to move to a position corresponding with thev full extension of the vessel, if not already iii that position; moving the needle valve to a position which decreases the amount of fuel supplied to the engine to that corresponding'w'ith the normal operation of the engine, on the one hand,

o r moving the butterfly valve 29 to a position which increases the amount of air supy plied the engine to that corresponding with pendently of t the normal operation of the engine, on theY other hand.

It is also desirable that means be provided whereby the aforesaid proportion-varying Ameans may be controlled manually inde- 'e temperature control. This becomes especially desirable when upon leakage, the .proportion-varying means is designed to ,assume apositiondecreasing the.

proportion of fuel to air. supplied to the engine, as 1n this event it becomes necessary to increase the richness of the mixture upon starting the cold engine. Any suitable means may be provided for accomplishing the independent manual controlof the proportion-varying means. Referring in detail to Fig. 4, one construction is' illustrated for accomplishing this result in connection with the embodiment of the invention illustrated in Fig. 2. Inthe form here shown, rack 22 is pivotally connected to the movable end wall 23, as shown at 32, and a spring 33 is provided for normally pressing the rack 22 into coperative engagement with the fpinion 21. A second rack`34 is pivotally connested to manual'operating means 35, and is normally urged toward engagement with the pinion 21 by .spring 36. A rotatable cam.

37 normally retains rack 34 out of engagement with the pinion 21 against thetension of spring 36. Cam 37` is4 adapted to be rotatedby crank'arm 38 connected with thev manually operated means 35.. Upon moving the manually'operated means 35 'toward .the left in Fig. 4, cam 37 will be rotated and move rack 22 out of engagement` with pinion 21'and permit rack 34 to move yinto engagement therewith. Further movement o the manually operated means to the left produces,l through reci'procation of rack 34, a corresponding rotation of pinion-21 and adjustment .of the needle valve.

In the form shown' in Fig. 5, aL manual control is applied to. the embodiment of the invention ofl Fig. 3. In this construction the movable end wall 23 is provided with a pivoted link 31 having a slot 39, and crank arm 30 is provided with a pin 40 movable within. said slot 39. A second arm 41, constituting a' crank for the butterfly valve 29, which arm may desirably bel made integral with the crank arm 30, is designed to be temperature,

vpand under the control of tiv'e fluid within the bulb -28 subjected to the` n operation, when the. engine is started e and the cylinders are cold, vessel 24 is contracted and the needle valve 8 or the butteriy valve 29 is in a position to proportion the supply of fuel to air so that a relatively rich mixture is admitted to the engine. As the engine cylinders' become warm, the cooling medium circulated through the cooling system rises in and thereafter has a temperature as it leaves the engine jacket or jackets which is lsubstantially proportional to the temperature of the engine cylinder or cylinders. As the cooling medium rises in temperature vessel 24 begins to extend or exthe thermosensitemperature of the cooling medium. As said vessel 24 extends with the rise of temperature, it `operates the needle valve through the rack and pinion to decrease thel tended to move the proportion-varying means to,`or retain the same in, a position 'corresponding with that assumed when. the engine is atK its normal operating temperature. vWith either embodiment ,of the invention, the proportion-varying means may `be manually adjusted independently of the temperature control by operation of the manual means 35 or 42, as heretofore exlained. Y, While the illustrated embodiments of the invention have been described with considerable partie 'larity, it is to be expressly understody that this invention is not .to be f' restricted to the forms shown on the drawings for it is susceptible of embodiment in a variety of mechanical expressions, some of which will readily suggest themselves to those skilled in the art. Furthermore, certain features of the invention are capable other features thereof. Aclimits of this invention are of use Without cordingly, the

to be determined by reference to the claims hereto apended.l What is-claimed is: d

1.v In an internal-combustion engine,;in

vcombination with a carbureter comprisingA a fuel-regulating valve and an air inlet cooperating therewith, means to varythe proiso portion or' fuel to air delivered by said carbureter, means for circulating a coolmg medium in operative relatlon to the engine,

and means automatically and solely controlled by the temperature ofJsaid cooling medium at substantially the temperatureat which it leaves said engine'for controlling said proportion-varying means.

2. In an internal-combustion engine, 1n combination with means supplying fuel and air thereto, means to vary the proportion of fuel to air delivered to said engine, means for ycirculatin a cooling medium in-operative relationto the engine, Van extensible and contractile vessel operatively related' to said cooling medium.

4. In an internal-combustion engine, in-

combination'rwith `a carbureter comprising la fuel-regulating valve and an air inlet cooperating therewith, means to vary the proportion of fuel to air delivered by said carbureter, and thermosensitive means controlling said proportion -varying Pmeans, said thermosensitive means being constructedto move said proportion-varying means, upon leakage of said thermosensitive means, to that position which corresponds with the normal operation of the engine.` a

5. In an internal-combustion engine, in.

combination` with a carbureter comprising a fuel-regulatlng valve and an air inlet cooperating therewith, means to vary the pro-' portion of fuel to air delivered by said carbureter, means for circulating a cooling medium in operative relation to the engine, and means automatically controlled by the temperature of said cooling medium at sub-` stantially the temperatureat which it leaves said .engine .for controlling said proportionvarying means, said controlling means being constructed to proportion said fuel and air, upon leakage of said controlling means,

t0 correspond withl the normalfrunning conditions-of the engine.

'l' 6. In an internal-combustion" engine, in

combinationwith means supplying fuel and means to vary the proportion of fuelto air delivered to said engine, means V'forj,circulating a cooling medium in opera.-

tive relation tothe engine, an extensible and contractible vessel operatively related to said `proportion-varying means, and means controlled by the temperature of said/cooling medium for causing extension and. contraction of said vessel, said `vessel possessing an inherent resiliency and being charged withv a fluid at a pressure below that to portion-varying means, said thermosensi-` tive means being constructed to operate said proportion-varying means and position the same to correspond with the normal running conditions of the engine upon leakage of said thermosensitive means.

8. In an internal-combustion engine, in combination with'means supplyingfuel and air thereto, means to vary the proportion of fuel to air delivered to said engine, means for`circulating a cooling medium in operative relation to the engine, and means automatically controlled by the temperature of said cooling mediumfor controlling said proportion-varying means, said controlling means being constructed to operate said proportion-varying means upon leakage of said controlling means so as to proportion the fuel and air to correspond `with the normal running conditions of the engine.

9'. In an internalcombustlon engine, in combination with acarbureter comprising a4 fuel-regulating valve and .an air inlet cooperating therewith, means to bureter, thermosensitive means controlling said proportion-varying means, and means forY manually controlling said proportionvarying means lindependently of said thermosensltive means.

10. In an internal-combustion engine, in combination with a carbureter comprisinga fuel-regulating'valve and an air inlet cooperating therewith, means to vary the proportion of fuel to air delivered by said carbureter, means for circulating a cooling medium in operative relation to the engine, means automatically controlled by the. teml perature of said cooling medium at substantial/ly the temperature at whichT it* leaves said engine for controlling said proportionvarying means, and vmeans for manually controlling said proportion-varying p means independently of saidtemperature control.

1l. In lan internal-combustion engine, in combination withmeans supplying fuel and air thereto, means to vary'the proportion of vary the proyportion of fuel to air delivered by said cari said rack;A

fuel to air delivered to said engineymeans for circulating a cooling medium in operation of said vessel, and means for manually operatingsaid proportion-varying means independently of said vessel. l 12. In an internal-combustion en 'ne, in

combination with the needle valve o'r supplying fuel thereto, a pinion on the stem of said valve, a rack cooperating therewith, andy thermosensitive means for operating 13. In an internalfcombustion engine, in combination with the needle valve for supplying fuel thereto, a pinion on Vthesten of said val-ve, a rackcoperating therewith, means for circulating a cooling medium in operative relation to the engine, and means automatically controlled bythe temperature of said cooling medium atsubstant'ially the temperature at which it leaves the engine for operating said rack.

14. In an internal-combustion engine, in combination with the valve for supplying fuel thereto, means for circulating a cooling.

medium in operative relation to the engine, an extensible and contractible vessel for operating said valve, and means directly controlled by the temperature of said cool- .ing medium for causing extension and contraction of said vessel. y

15. -In an internal-combustion engine, in

combination with a valve for supplying fuel thereto,thermosensitive means for re ulating said valve to vary the amount o fuel supplied, said thermosensitive means being constructed to position said valve, upon leakage 0f said thermosensitive means, to. c0r

respond with the normal running conditions of the engine.

16. In an internal-combustion engine, in\ combination with the valvev for supplyingv fuel thereto, means for circulating a cooling -medium in operative relationto the engine,

and means automatically controlled by the temperature of said cooling medium at substantially the temperature at which it leaves the engine, for controlling said valve, said controlling means being constructed to posi tion said, valve, upon failure of said controlling means, to correspond with thevnormal running conditions of the engine 17'. In an` internal-combustion engine, in

` combination with a valve for supplying fuel thereto,l thermosensitive means for regulating said valve to vary the amount offuel supplied, and means for manually adjusting said --valve independently of saidthermo sensitive means.

18. In an internal-combustion engine, in combination with the valve for supplying prop fuel thereto, means for circulating a cooling medium in operative relation to the engine, means automatically controlled. by the tem'- perature of said cooling medium at substantiallythe temperature at which it leaves said engine for controlling said valve, and means for manuall adjusting saidvalve independently of sai temperature control. u

19. In an internal combustion engine, in combination with a valve for supplying fuel thereto, thermosensitive means for regulating said valve to vary vthe amourtpf fuel supplied, said thermosensitive means comprising an eXtensible and contractible vessel j normally contracted against a resilient force and adapted uponfailure of the thermosen- -sitive means to move said valve to a position corresponding with the normal operating conditions of the engine.

20. In an internal combustion engine ,in combination with a valve for supplying fuel thereto, means for circulating a cooling me-` dium in operative relation to the engine, and thermosensitive means subjected Ito and. solely controlled by said cooling medium n at substantially the temperature at which itl 'to said valve for regulating the samef' 21. In an internal combustion "engine, in combination with means supplying fuel and air thereto, meansto vary .the proportion of fuel to air delivered to said engine, and ther-fA mosensitive means for controlling said proportion-varying means, said thermosensitive means comprising an extensible rand contract'iblovessel normally contracted against a resilient force and l adapted upon failure of the thermosensitive means to move said proportion-varying means to a position corre'- sponding with the normal operating conditions of the-engine.

.22.' In an interval combustion engine,r in combination witha valvev for varying the proportion of fuel to air supplied thereto, a pinion on the stein-of said va ve, racks adapted to engage said pinion, thermosensitivemeans operatively ,connected to one of saidracks, manually-operable means operatively connected to the other of said racks, and means, for simultaneouslyK disconnecting .either of said racks from said inion and a pinion on the` stem of said, valve, racks adapted to engage said pinion; thermosensitive means operatively connected toone of said racks, manually-operable means operatively connected to the other of said racks, 125 and means operable by said manually-operable means for simultaneously disconnecting either'iof said racks from said pinion 'and engagin the other rack therewith. A

24. n an-internal ,combustiomengine, in

ortion of .fuel to air supplied thereto,`12

combinatioiiwith a valve for garying the proportion of fuel to air supplled thereto, a plnion on the stem of said valve, racks adapted to engage said pinion, mally urging said racks .tinto engagement with said pinion, thermosensitive means op= eratively connected to one ofsaid racks, manually-operable means operatively Vconnected to the-other of said racks, and a'. 'cam -for simultaneously disconnecting either of said racks fromsaid pinion and engaging the other rack therewith.

25. In an internal combustion engine, in combination with a valve for varying the proportion of fuel to air su plied thereto,a

` plnion on the stem of said va ve, racks adapted to` engage said pinion, springs normally urging said racks into engagement with said pinion, thermosensitive means operatively connected to one of'said racks, manuallyoperable means operatively connected to the other of saidfrac'ks, and a cam operable by said manually-operable means for simul by the temperture of said 'cooling medium springs nor-l v at substantiallyf the temperature at which it leaves said engine for regulating said proportionlvarying means. f

27. In an internal combustion engine,in

--combination with means supplying. fuel and 'aii` thereto, means to varyn the proportion of fuel to air delivered to said engine, thermo- 'sensitive means for controlling said 4propor- `tionvarying means, and means for manually controlling l said proportion-varying lmeans independently of said thermosensitive means.

28. In an internal combustlon engine, 1n

combination with means supplying fuel and air thereto, means to vary/th proportion of fuel to air delivered to said engine, thermosensitive means for controllingsaid proportion-varying means, means for manually controlling said proportion-varying means,

and connections between said proportionvarying means and said thermosensitive and manually-operative means whereby eithen may be operated independently of the other.

29.. In an internal combustion engine, in combination with a valve for supplying fuel thereto, thermosensitive means yfor regulating said valve, manual means for regulating said Valve, and connections between said valve and said thermosensitive and manualkmeans whereby either may be operated independently ofthe other. n

In testimony whereof I have signed this specification.

` .I EAN V. GIESLER. 

